Blower



April 1948. T. s. BRISKIN 2, 0,363

BLOWER Filed Feb. 5, 1945 5 Sheets-Sheet 2 j}! fer: 20 7'' feodor'e 91572311 0? Z l jlfarrze ys T. S. BRISKIN April 27, 1948.

BLoviER 5 Sheets-Sheet 3 ON, \M/7 5; M. I wwfi Q 4/ J KN April 1948. T. 's. BR'lSKlN 2,440,363

BLOWER Filed Feb. '5, 1945 5 Sheets-Sheet 4 3 Jfieodare 5 3732:91 1):

?atented Apr. 27, 1948 UNITED A STATES PATENT. OFFICE Application February 5, 1945, Serial No. 576,234

2 Claims.

This invention relates to improvements in-heaters, and in particular to heaters adapted for automobile use.

Automobile heaters and the like, include a heat exchange device, together with means for blowing a stream of air across the surface thereof. In the preferred embodiment of the invention herein shown and disclosed, the heat is supplied by hot water from the cooling system of an automobile. However, it will be evident that the principles of this invention are applicable to heaters other than automobile heaters.

It is an object of this invention to provide a heater in which there is a substantially uniform air flow across the heat exchange device. In most automobile heaters, the fan is disposed adjacent to and behind the heat exchange device or radiator core. The usual axial delivery fan is much more eflicient at the periphery, than at points closer to the center, and in the vicinity of the center, air actually flows in the reverse direction. Therefore it will be evident that in the usual type of construction, the peripheral portions of the heat exchange device are called upon to heat a considerably greater volume of air in a given time, than the central portions. Thus the maximum amount of heat is not derived from a core construction of given size. Furthermore, the core sections are generally of rectangular cross section, so that the corners thereof generally lie outside of the path of the air stream which is of circular cross section.

This invention contemplates a construction wherein the heat exchange device and the fan are spaced from each other by a sufiicient distance so that there is a substantially uniform air flow through the heat exchange device. Thus greater efiiciency is achieved.

More specifically, a housing is providedwith a spaced inlet and outlet, and air propelling means are disposed at the outlet which serv to decrease the pressure within the housing. The heat exchange device is disposed at the inlet, and as air rushes in the inlet with an equalized velocity at all portions thereof, it necessarily passes through the heat exchan e dev ce and all portio s of the air stream are heated to a substantially equal extent.

The location of an automobile heater under a dashboard makes a side inlet preferable to a rear inlet, the outlet being at the front of the heater, this being the portion of the heater that faces the occupant of the automobile. With a side intake the heater can be placed immediately adjacent the partition between the motor compartments and the passenger compartment of the automobile. Furthermore, if the intake and the outlet are aligned at the front and rear walls of the housing, the parts disposed between the through the inlet. These obstructing parts include not only the fan motor, but also the blower, which is often provided when a defrosting attachment is built into the heater.

It is a further object of my invention to provide a heater construction in which the arrangement of the inlet and outlet is such that the working parts of the air propelling mechanism do not tend to destroy the uniformity of the air flow through the inlet.

A still further object of this invention is to provide in a heater in which the inlet and outlet are not aligned with each other, improved means for insuring uniformity of the air stream pass-' ingthrough the outlet. In other words, it has been found that when the inlet is provided in a side wall, that that portion of the air stream passing through the outlet which has the greatest velocity, is that portion which is most remote from the inlet. This unsymmetrical .dis-

tribution of the high velocity area of the outlet provides means for correcting this objectionable condition.

Other objects, features and advantages will become apparent as the description proceeds.

With reference now to the figures. in which like reference numerals designate like parts Fig. 1 is a front view of an automobile heater embodying a preferred form of this invention;

Fig. 2 is a top view thereof; Fig. 3 is a left end view thereof Fig. 4 is a right end view thereof; Fig. 5 is a section taken along line 5-5 of Fig. 2;

Fig. 6 is a section'taken along line 6--6 of Fig. 1;

Fig. 7 is an enlarged detail section taken along line II of Fig. 1;

Fig. 8 is a detailed section taken along line 88 of Fig. 6;

Fig. 9 is a top view of a modified form of the invention, similar to Fig. 2, but in which certain portions of the housing are broken away to show the builtup shield or correcting device disposed at the outlet;

Fig. 10 is a rear view of the shield; and F g. 11 is a detailed view of the shield, shown partly in section.

The housing of the heater is designated by the reference numerals l5, and it is provided with two tend to destroy the uniformity of air flow openings, designated as the inlet 22 and the main outlet 20. The inlet is at one side, as shown in Figs. 2 and 4, and the oulet is in the front wall oi. the housing. An angular frame I 6 is suitably mounted at the main outlet 29, as shown in Figs. 1 and 6, and it is provided with a plurality of shutters l1. These shutters have knobs l8 so that they can be opened or closed to regulate the size of the air stream, and also to deflect the air stream downwardly. A knob I9 is provided on the annular frame by means of which it may be rotated with respect to the housing in order to change the direction of the de-* flection of the air stream, it being understood that the shutters rotate with the frame.

A defrosting outlet duct 2| is provided at the left end of the housing i5, The inlet 22, as shown in Fig. 5, is provided with a suitable screen 23 to keep foreign matter out of the housing. Louvers 24 are provided in the front wall of housing l5, at one side of the outlet 20, these louvers forming an additional intake, as will be hereinafter described.

A suitable mounting plate 25 is provided at the rear of the heater, whereby it may be mounted in an automobile. Also extending from the rear of the housing are inlet and outlet pipes 26 and 21, respectively. These connect with a radiator core 28 which is disposed in the housing adjacent the inlet 22. The radiator core includes the usual headers 42 and 43. which form a connection between the inlet and outlet pipes and the core proper.

Secured to suitable lugs 30 which form a part of the housing I5, is a vertical support 3!, A fan motor 32, as clearly shown in Fig. 6, is carried by the vertical support. The motor shaft 33 carries at its front end an axial delivery fan 34, and at its rear end a radial delivery fan or blower 35. The central portion of the blower 35 comprises an inlet 36, and the arrangement of the blades of the blower 35 is shown in Figs. 6 and 8. Associated with the blower 36, and mounted on the vertical support 3|, is a collecting shell 31 which is in communication with the outlet duct 2|. Thus it will be seen that when the motor is en; ergized, both the fan 34 and the blower 35 will bev rotated, and one stream of air will be blown through the outlet 29 by the fan 34, and another stream will be blown through the defrosting outlet duct 2| by blower 35. The reduced pressure within the housing I5, occasioned by the operation of these elements will cause air to be drawn into the inlet 22 and past the radiator core 28.

Disposed at the main outlet 29, and surrounding-the fan 34, is a short duct or shield 38. The shield38 is provided with a flange 40 by means of which it may be secured with respect to the housing, as shown in Fig. 6. A protecting screen 4| may be disposed across the outlet 20 in the usual manner.

The construction of the louvers 24 is shown in detail in Fig. 7. These are merely stampings in the housing I 5, and they form additional inlets 44 which permit an additional supply of air to be drawn through the side portions of the core 28, thus utilizing to a greater extent, the full cross sectional area of the core.

In operation, the joint action of the fan 34 and the blower 35 reduces the pressure within the housing I5, This causes air to pass into the housing through the inlet 22. The fan and the blower are spaced a suflicient distance from the inlet, that the reduced pressure at the inletis substantially uniform at all portions, This means that an air stream of uniform velocity will pass through the core, thereby utilizing all portions of the core and making for greater eill ciency. A portion of the transversely movin air stream will be drawn into the collecting shell 31, by means of the blower 35, this being the portion which passes through the rear portion of the core 29. The remainder of that portion of the transversely flowing air stream will pass around the shell and will fiow forwardly. It will be noted that a portion of the housing. designated by the reference numeral 45, is diagonally disposed, which may be of assistance in changing the direction of the air stream.

The fan motor 32, being of circular cross section, does not constitute such an impediment to the flow of the transverse air stream as would cut down the efficiency of the device, this being for the reason that the circular section is parallel to the path of the horizontally flowing air stream. It has been found that the velocity of the transversely flowing air stream at th inlet 22 is substantially uniform for all portions of the area of the inlet.

In Figs. 9, 10 and ii is shown a modified form of my invention, in which the shield 38 shown in Figs. 1 to 8, inclusive, is of a diflerent form. The other parts of the modificatio are substantially identical with the device shown in Figs. 1 to 8, an are therefore provided with the same reference numeral, and will not be further described herein.

That side of the shield 38 which is close to the core 28 is built up, as indicated by the reference numeral 39. This built-up portion forms a partial barrier to cause deflection of the air passing through the inlet 22, so that there will be a more even distribution of the air stream which passes through the outlet 20.

It has been found that without the built-up portion, that portion of the air stream passing through the outlet which has the greatest velocity is the peripheral portion of the air stream which is on the remote side of the center of the shaft. It has further been found, that in that portion of the outlet which is toward the radiator core, the air actually flows in ,the reverse direction. Furthermore, the reverse direction air flow is extended from a small area around the center of the outlet, to a larger area which extends downwardly and in said remote direction. However, when the shield is built up as indicated by the reference numeral 39, the characteristics of the air stream passing through the outlet 29 are substantially symmetrical with respect to the axis of the fan, This produces a much more efllcient construction, not only from the viewpoint of the delivery of the heated air stream, but also it results in a greater lowering of the pressure within the housing l5, and consequently causes a greater volume of air to be drawn through the core 28.

The operation of the modification is substantially the same as pointed out with respect to Figs. 1 to 8, with the exception that the built-up portion of the shield 39 causes a better pressure distribution across the outlet 20.

The transverse incoming air stream apparently has a certain amount of inertia which would ordinarily cause it to pass all the way across the housing so that the resulting air stream passing through the outlet 20 would be concentrated at a remote portion of the outlet. However, the presence of the built-up portion 39 apparently causes a low pressure area which defleets a portion oi the transversely moving air stream so that the forwardly moving air stream is substantially symmetrical.

It will be apparent that various modifications and changes may be made in the preferred embodiments oi the invention herein shown without departing from the spirit of the invention.

The foregoing description and the drawings are deemed to be illustrative only, and the invention to be limited only by the following claims.

I claim:

1. In a heater in which the parts are arranged so that the inlet air stream moves in a transverse direction with respect tothe outlet air stream, and havinga fan disposed in the path of said outlet air stream, an interiorly extending duct disposed around said fan, said duct being built up at the windward side so as to form a partial barrier for said transversely flowing air stream.

2. In a heater in which the parts are arranged so that the inlet air stream moves in a transverse direction with respect to the outlet air stream, and having a an disposed in the path or said outlet air stream, an interiorly extending a 2,3

6 duct disposed around said fan, said duct being built up at the windward side so as to form a partial barrier for said transversely flowing air stream, and a motor for said fan having a housing of substantially circular cross section whereby the velocity distribution of the outlet air stream is substantially symmetrical with respect to the axis of said tan.

THEODORE S. BRISKIN.

REFERENCES CITED The following references are of record in the file of this patent:

' UNITED STATES PATENTS Number Name Date 1,923,355 D'arrah Aug. 22, 1933 1,928,094 Darrah et a1. Sept. 26, 1933 1,946,994 Walderlow Feb. 13, 1934 2,138,259 Sperry Nov. 29, 1938 2,160,278 Ness et al. May 30, 1939 2,171,944 Mullen Sept. 5, 1939 2,188,388 Butter-field Jan. 30, 1940 2,241,753 Whitlark May 13, 1941 Auflero May 20, 1941 

